多功能添加剂用于高压金属电池中的电解质稳定和电极/电解质相间调节
Heyuan Sun1,2,3, Yue Dong2,4, Kai Zhang1,2,3
1State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Lanzhou University of Technology, Lanzhou 730050, China.
ACS applied materials & interfaces
|April 17, 2025
概括
亚二甲基 (ATMS) 添加剂稳定了金属电池中的接口. 这通过防止树突的生长和增强阴极稳定性来改善周期寿命和能量密度.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 金属电池 (LMB) 提供高能量密度,但在电解质电极接口 (EEI) 方面面临挑战.
- 在LMB中的富含的阴极需要稳定的接口来实现实际应用.
- 由于相间不稳定,现有的电解质难以维持性能.
研究的目的:
- 研究亚二甲基 (ATMS) 作为LMB中的碳酸盐基电解质的多功能添加剂.
- 了解亚齐多基在ATMS中稳定阴极和阳极接口的双重作用.
- 评估ATMS对LMB电化学性能和循环寿命的影响.
主要方法:
- 引入ATMS作为传统碳酸盐电解质中的添加剂.
- 电化学特征的基底下机NCM811,基底下机Li对称,和基底下机Cu电池与ATMS.
- 使用电化学性能指标分析相间形成和稳定性.
主要成果:
- ATMS 形成稳定的阴极电解质介相,并抑制阳极上的树状的生长.
- 在ATMS中的Si-N键中和HF,防止反复出现的相间问题.
- 在600个循环后,Liidiye NCM811细胞的容量保留从34.7%提高到82.6%.
- 基二氧化对称细胞的寿命延长了800小时,基二氧化细胞的库伦比效率从81.6%提高到91.6%.
结论:
- 在LMB中,ATMS有效地稳定了电解质-电极界面.
- 该添加剂显著提高了长周期性能,库伦比克效率和高压稳定性.
- ATMS为推进高能量密度金属电池的实际应用提供了一个有前途的解决方案.
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